525817 has 2 divisors, whose sum is σ = 525818. Its totient is φ = 525816.

The previous prime is 525809. The next prime is 525839. The reversal of 525817 is 718525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430336 + 95481 = 656^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 525817 - 2³ = 525809 is a prime.

It is not a weakly prime, because it can be changed into another prime (525887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262908 + 262909.

It is an arithmetic number, because the mean of its divisors is an integer number (262909).

2⁵²⁵⁸¹⁷ is an apocalyptic number.

It is an amenable number.

525817 is a deficient number, since it is larger than the sum of its proper divisors (1).

525817 is an equidigital number, since it uses as much as digits as its factorization.

525817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 28.

The square root of 525817 is about 725.1324017033. The cubic root of 525817 is about 80.7132573177.

The spelling of 525817 in words is "five hundred twenty-five thousand, eight hundred seventeen".